Tube closure



FIG. 1 is a top, front, right perspective view of a tube closure showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a top, rear, left perspective view thereof.

The broken lines are shown for the purpose of illustrating parts of the tube closure that form no part of the claim. 

CLAIM The ornamental design for a tube closure, as shown and described. 